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   1 /*
   2  * Keystone2: DDR3 test commands
   3  *
   4  * (C) Copyright 2012-2014
   5  *     Texas Instruments Incorporated, <www.ti.com>
   6  *
   7  * SPDX-License-Identifier:     GPL-2.0+
   8  */
   9
  10 #include <asm/arch/hardware.h>
  11 #include <asm/arch/ddr3.h>
  12 #include <common.h>
  13 #include <command.h>
  14
  15 DECLARE_GLOBAL_DATA_PTR;
  16
  17 #define DDR_MIN_ADDR            CONFIG_SYS_SDRAM_BASE
  18
  19 #define DDR_REMAP_ADDR          0x80000000
  20 #define ECC_START_ADDR1         ((DDR_MIN_ADDR - DDR_REMAP_ADDR) >> 17)
  21
  22 #define ECC_END_ADDR1           (((gd->start_addr_sp - DDR_REMAP_ADDR - \
  23                                  CONFIG_STACKSIZE) >> 17) - 2)
  24
  25 #define DDR_TEST_BURST_SIZE     1024
  26
  27 static int ddr_memory_test(u32 start_address, u32 end_address, int quick)
  28 {
  29         u32 index_start, value, index;
  30
  31         index_start = start_address;
  32
  33         while (1) {
  34                 /* Write a pattern */
  35                 for (index = index_start;
  36                                 index < index_start + DDR_TEST_BURST_SIZE;
  37                                 index += 4)
  38                         __raw_writel(index, index);
  39
  40                 /* Read and check the pattern */
  41                 for (index = index_start;
  42                                 index < index_start + DDR_TEST_BURST_SIZE;
  43                                 index += 4) {
  44                         value = __raw_readl(index);
  45                         if (value != index) {
  46                                 printf("ddr_memory_test: Failed at address index = 0x%x value = 0x%x *(index) = 0x%x\n",
  47                                        index, value, __raw_readl(index));
  48
  49                                 return -1;
  50                         }
  51                 }
  52
  53                 index_start += DDR_TEST_BURST_SIZE;
  54                 if (index_start >= end_address)
  55                         break;
  56
  57                 if (quick)
  58                         continue;
  59
  60                 /* Write a pattern for complementary values */
  61                 for (index = index_start;
  62                      index < index_start + DDR_TEST_BURST_SIZE;
  63                      index += 4)
  64                         __raw_writel((u32)~index, index);
  65
  66                 /* Read and check the pattern */
  67                 for (index = index_start;
  68                      index < index_start + DDR_TEST_BURST_SIZE;
  69                      index += 4) {
  70                         value = __raw_readl(index);
  71                         if (value != ~index) {
  72                                 printf("ddr_memory_test: Failed at address index = 0x%x value = 0x%x *(index) = 0x%x\n",
  73                                        index, value, __raw_readl(index));
  74
  75                                 return -1;
  76                         }
  77                 }
  78
  79                 index_start += DDR_TEST_BURST_SIZE;
  80                 if (index_start >= end_address)
  81                         break;
  82
  83                 /* Write a pattern */
  84                 for (index = index_start;
  85                      index < index_start + DDR_TEST_BURST_SIZE;
  86                      index += 2)
  87                         __raw_writew((u16)index, index);
  88
  89                 /* Read and check the pattern */
  90                 for (index = index_start;
  91                      index < index_start + DDR_TEST_BURST_SIZE;
  92                      index += 2) {
  93                         value = __raw_readw(index);
  94                         if (value != (u16)index) {
  95                                 printf("ddr_memory_test: Failed at address index = 0x%x value = 0x%x *(index) = 0x%x\n",
  96                                        index, value, __raw_readw(index));
  97
  98                                 return -1;
  99                         }
 100                 }
 101
 102                 index_start += DDR_TEST_BURST_SIZE;
 103                 if (index_start >= end_address)
 104                         break;
 105
 106                 /* Write a pattern */
 107                 for (index = index_start;
 108                      index < index_start + DDR_TEST_BURST_SIZE;
 109                      index += 1)
 110                         __raw_writeb((u8)index, index);
 111
 112                 /* Read and check the pattern */
 113                 for (index = index_start;
 114                      index < index_start + DDR_TEST_BURST_SIZE;
 115                      index += 1) {
 116                         value = __raw_readb(index);
 117                         if (value != (u8)index) {
 118                                 printf("ddr_memory_test: Failed at address index = 0x%x value = 0x%x *(index) = 0x%x\n",
 119                                        index, value, __raw_readb(index));
 120
 121                                 return -1;
 122                         }
 123                 }
 124
 125                 index_start += DDR_TEST_BURST_SIZE;
 126                 if (index_start >= end_address)
 127                         break;
 128         }
 129
 130         puts("ddr memory test PASSED!\n");
 131         return 0;
 132 }
 133
 134 static int ddr_memory_compare(u32 address1, u32 address2, u32 size)
 135 {
 136         u32 index, value, index2, value2;
 137
 138         for (index = address1, index2 = address2;
 139              index < address1 + size;
 140              index += 4, index2 += 4) {
 141                 value = __raw_readl(index);
 142                 value2 = __raw_readl(index2);
 143
 144                 if (value != value2) {
 145                         printf("ddr_memory_test: Compare failed at address = 0x%x value = 0x%x, address2 = 0x%x value2 = 0x%x\n",
 146                                index, value, index2, value2);
 147
 148                         return -1;
 149                 }
 150         }
 151
 152         puts("ddr memory compare PASSED!\n");
 153         return 0;
 154 }
 155
 156 static int ddr_memory_ecc_err(u32 base, u32 address, u32 ecc_err)
 157 {
 158         u32 value1, value2, value3;
 159
 160         puts("Disabling DDR ECC ...\n");
 161         ddr3_disable_ecc(base);
 162
 163         value1 = __raw_readl(address);
 164         value2 = value1 ^ ecc_err;
 165         __raw_writel(value2, address);
 166
 167         value3 = __raw_readl(address);
 168         printf("ECC err test, addr 0x%x, read data 0x%x, wrote data 0x%x, err pattern: 0x%x, read after write data 0x%x\n",
 169                address, value1, value2, ecc_err, value3);
 170
 171         __raw_writel(ECC_START_ADDR1 | (ECC_END_ADDR1 << 16),
 172                      base + KS2_DDR3_ECC_ADDR_RANGE1_OFFSET);
 173
 174         puts("Enabling DDR ECC ...\n");
 175         ddr3_enable_ecc(base, 1);
 176
 177         value1 = __raw_readl(address);
 178         printf("ECC err test, addr 0x%x, read data 0x%x\n", address, value1);
 179
 180         ddr3_check_ecc_int(base);
 181         return 0;
 182 }
 183
 184 static int do_ddr_test(cmd_tbl_t *cmdtp,
 185                        int flag, int argc, char * const argv[])
 186 {
 187         u32 start_addr, end_addr, size, ecc_err;
 188
 189         if ((argc == 4) && (strncmp(argv[1], "ecc_err", 8) == 0)) {
 190                 if (!ddr3_ecc_support_rmw(KS2_DDR3A_EMIF_CTRL_BASE)) {
 191                         puts("ECC RMW isn't supported for this SOC\n");
 192                         return 1;
 193                 }
 194
 195                 start_addr = simple_strtoul(argv[2], NULL, 16);
 196                 ecc_err = simple_strtoul(argv[3], NULL, 16);
 197
 198                 if ((start_addr < CONFIG_SYS_SDRAM_BASE) ||
 199                     (start_addr > (CONFIG_SYS_SDRAM_BASE +
 200                      CONFIG_MAX_RAM_BANK_SIZE - 1))) {
 201                         puts("Invalid address!\n");
 202                         return cmd_usage(cmdtp);
 203                 }
 204
 205                 ddr_memory_ecc_err(KS2_DDR3A_EMIF_CTRL_BASE,
 206                                    start_addr, ecc_err);
 207                 return 0;
 208         }
 209
 210         if (!(((argc == 4) && (strncmp(argv[1], "test", 5) == 0)) ||
 211               ((argc == 5) && (strncmp(argv[1], "compare", 8) == 0))))
 212                 return cmd_usage(cmdtp);
 213
 214         start_addr = simple_strtoul(argv[2], NULL, 16);
 215         end_addr = simple_strtoul(argv[3], NULL, 16);
 216
 217         if ((start_addr < CONFIG_SYS_SDRAM_BASE) ||
 218             (start_addr > (CONFIG_SYS_SDRAM_BASE +
 219              CONFIG_MAX_RAM_BANK_SIZE - 1)) ||
 220             (end_addr < CONFIG_SYS_SDRAM_BASE) ||
 221             (end_addr > (CONFIG_SYS_SDRAM_BASE +
 222              CONFIG_MAX_RAM_BANK_SIZE - 1)) || (start_addr >= end_addr)) {
 223                 puts("Invalid start or end address!\n");
 224                 return cmd_usage(cmdtp);
 225         }
 226
 227         puts("Please wait ...\n");
 228         if (argc == 5) {
 229                 size = simple_strtoul(argv[4], NULL, 16);
 230                 ddr_memory_compare(start_addr, end_addr, size);
 231         } else {
 232                 ddr_memory_test(start_addr, end_addr, 0);
 233         }
 234
 235         return 0;
 236 }
 237
 238 U_BOOT_CMD(ddr, 5, 1, do_ddr_test,
 239            "DDR3 test",
 240            "test <start_addr in hex> <end_addr in hex> - test DDR from start\n"
 241            "    address to end address\n"
 242            "ddr compare <start_addr in hex> <end_addr in hex> <size in hex> -\n"
 243            "    compare DDR data of (size) bytes from start address to end\n"
 244            "    address\n"
 245            "ddr ecc_err <addr in hex> <bit_err in hex> - generate bit errors\n"
 246            "    in DDR data at <addr>, the command will read a 32-bit data\n"
 247            "    from <addr>, and write (data ^ bit_err) back to <addr>\n"
 248 );